Furnace.



IEA W. FCLTZ, 0F CHICAGO, ILLINOIS, ASSIGNGR TO THE EUREKA SMOKELESS FURNCE COMPANY, 0F CHICAGO, ILLINOIS7 A CORPORATION 0F ILLINOIS.

FUBNACE.

Specicati on of Letters Patent.

Patented July ai, i917.

To all whom 'it may concern:

Be it known that I, IRA WASHINGTON Fon'rz, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Furnaces, of which the following is a speciication.

The main objects of this invention are to provide improved means for increasing the eiliciency of furnaces and preventing smoke by causing a more complete consumption of the combustible ingredients ofl coal; to provide an improved structure and arrangement of baille wall; to provide a construction for such baille wall which will permit of ready adjustment to suit beds of coal of different depths and thus serve to obviate the necessity of banking fires or burning fuel at low efciency when the normal load is reduced; to provide improved means for collecting and conducting the gases of the coal to a lace of combustion, to which is also supp ed the required amount of air to insure thorough combustion of said gases; to provide a removable or hinged baie ,wall

between the firellox and combustion cham-- ber permitting access to the boiler for cleaning the same, while normally serving to prevent'the escape of gas before being consumed and direct the gas to a place of in.

tense combustion in the lire; to provide improved means for causing the combustion of gases given od by coal, which means may be readily fitted to furnaces of old types not originally provided with such or similar means; and to provide an improved means removable from the furnace for conducting a draft into sides of body of coal on the furnace grate and for preventingl ashes from accumulating and lessening the draft at the sides of the grate.

An illustrative embodiment of this invention is shown in the -accompanying drawin in whichy igure 1 is a view in transverse vertical section of a furnace constructed according to this invention.

'Fig 2 is a longitudinal sectional view of the same.

Fi 3 is a detail in elevation of a remova le baie wall.

Fig. et is a side elevation of the baiiie wall.

Fig. 5 is a detail of one of the removable side draft units.

Furnaces of the general type shown in the drawings have been furnished with baille walls above the rear end of the grate, these walls serving to direct the normal draft longitudinally along the grate and also to cause gases which have accumulated in front of said baile wall to pass downwardly at a place of intense combustion toward the rear of the grate. Said walls were built in or rigidly installed in the furnace and made diicult the cleaning of the boiler fines, usually necessitating removing said baille wall or to breaking through the rear Wall of the furnace in order to permit access to the luesof the boiler.

In the present case, this wall is hinged and removably mounted within the fire-box and therefore may be swung upwardly out of the way to permit access to the boiler iiues from the front through the iiring door, and may be easily fitted to furnaces of old types l-whereby their eiiiciency is increased inthe'matter of consuming the combustible gases of. the coal which, to a large extent, are wasted in some furnaces.- Said baille Wall is also made extensible in orderthat the area of the free space between the grate and the lower end of the baie wall may be regulated to suit small fires when the furnace is not .carrying a large load.

The furnace shown in the drawing is of well known construction in regard to the boiler 1, ate 2 and the inclosing walls or.

. ystruction of the baille wall are, in leaving this space, directed downwardly to a near the rear ol the 2 vvhere there is ordinarily sucient heat to cause the combastion. of the gases. Under normal conditions, most of the gas circulates through the coal downwardly below the bae Wall to the desired place oi combustion, or there is considerable coal on the grate, some of the gases are conducted downwardly as require through pipes embedded in the bae vra-,ll and having inlets 11 and 12 in the oi the bae Wall and outlets 13 at the bottom of the bacli ot the bae Wall. 'lhe battle `wall is also `provided with an air passage 14 having outlets 15 near the outlets 13. 'lhe air' passage 14: is supplied with air through conduits 16 in the Water legs ot the boiler and which register with the open ends 1'? or the passage 111, these con-- duits 16 communicating vvith the air space outside ci? the water legs to which air is conducted by the channel 168.

The bao Wall d' is pivotally supported on the walls ci the lirefbox, and to this end sockets 18 seated in said Walls, receive the ends oi a pair ot slidable bolts 19 in apertures 20 in the bams wall. These bolts may be forced outwardly into sockets 18 when thebae Wall is placed in position with the bolts 19 4in registry with' said sockets. The bae Wall has a groove 2d in its sides and upper edge for receiving an asbestos packing 25. This packing also encircies the ends 26 of the air conduit 141 and bolts 19.

ln order to prevent the escape ot gas be tore it is thoroughly heated and consumed, When it is desired to operate the furnace considerably less than its lull capacity and there is little coal on grate 2, the bae wall a is provided with an extension 27 for closing the space between the coal and the lower edge of the baflle Wall. The member 27 may be supported on the inner Walls oi the lire bon, independently of baille Wall 4C, on lugs 28 in the said Walls of the furnace and has a plurality of inclined recesses 29 for cooperating with said lugs, whereby its height above the grate may be regulated. 'lo facilitate the handling and adjustment of member 27, it is provided with apertured ears 30 through which a tool may be inserted when the member 27 is to be removed or vertically adjusted with respect to the bale Wall Il.

llor the purpose oi3 increasing the effective grate surface and insuring that the proper quantity of Warm air may be supplied to the fuel body, and also tor the purpose of preventing accumulation of ashes at the sides of the grate, removable frames or plates 31 are arranged at the sides of the furnace immediately above the grate rests 32. "Ihe frames 31 have flanges 33 at their upper ends for engaging the supporting lugs 3% on the Walls of the lire-bon, and

are open at their loafer ends, with the exception or the space occupied by the spacing legs 35. The side `Walls of the frames are provided With outlet apertures 36. 'lhe air passing up at the sides of the grate around the grate rests may freely enter the trames 31, at bottom and the trames serve as of the coal as pass along vvith the draft are,`

as usual, more or less burned before escaping into the chimney. The gas which arise from the coal cannot escape Without first reaching a place of intense combustion, as the only outlet for said gases is around the lower edge of badle Wall d or through the conduits 10, these'conduim serving to direct said gases to a point of intense combustion nearer the lower end of the baille. rlhe gases are therefore brought to aV high temperature While still ,Within the region of flame. Any additional air which is required to insure the combustion of gases at the bae Wall is furnished through the conduits 16 and lil, the outlets for the latter being the apertures 15 in the rear ol baille Ll.

ln such instance Where the Work required by the furnace is considerably less than its normal capacity, the extension 27 of baa Ll is employed to lessen the space between the lower end of the main balile and the grate 2 in order that there shall be little, if any, tree passage for the escape of unburned gas in the normal line of draft since it would then pass out of the furnace at a velocity too great to insure itsthorough combustion.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted Without departing from the spirit of this invention as defined by the following claims.

l clainmy 1. A furnace structure having a hre box, combustion chamber and ash pit, a grate structure beneath both said fire box and combustion chamber and separating said box and chamber from said ash pit, a baile Wall structure interposed between said combustion chamber and hre box and extending downwardly to the normal top level of the Jfuelv1 said baille tvall having passageways therethrough to permit the passage of gases trom the lire boi; 'to the combustion chai-nias ber, means for supplying fresh air to said fire box above the grate, said baille wall having a fresh air duct communicating with said combustion chamber, and means for supplying freshI air to said duct.

2. A furnace structure having a fire box, combustion chamber and ash pit, a grate structure beneath both said re box and combustion chamber and separating said box and chamber from said ash pit, a balie wall structure interposed between said combustion chamber and fire box and extending downwardly to the normal top level of the fuel, said baffle wall having passageways therethrough to permit the passage of ases from the lire box to the combustion c amber, said baille Wall having a fresh air duct communicating with said combustion chamber, and means for supplying fresh air to said duct.

3. A furnace structure having a lire box, combustion chamber and ash pit, a grate structure beneath both said lire box and combustion chamber and separating said box and chamber from said ash pit, a baie wall structure interposed between said combustion chamber and re box and extending downwardl to the normal top level ofthe fuel, said aille wall having passageways therethrough to permit the passage of gases from the re box to the-combustion chamber, means for supplying fresh air to said lire box above the grate, and means for supplying fresh air vfor mixing with the gases immediately to the rear of said baille wall.

4. A furnace structure having a lire box, combustion chamber and ash pit, a grate structure beneath both said lire box and combustion chamber and separating said box and chamber from said ash pit, a bae wall structure interposed between said combustion chamber and lire box and extending downwardly to the normal top level of the fuel, said balile wallhaving passageways therethroughto permit the passage of gases from the lire box to the combustion cham# y ber, means for supplying fresh air to said lire box above the grate, said baffle wall having a fresh air duct communicating with said combustion chamber, and means for supplying fresh air to said duct, said baille wall except for the passageways above stated closing the space between 'the combustion chamber and said fire box from the normal top level of the fuel upwardly.

5. A furnace structure having a lire box, combustion chamber and ash pit, a grate structure ybeneath both said lire box and combustion chamber and separating said box and chamber from said ash pit, a baille wall structure interposed between said combustion chamber and lire box and extending downwardly to the normal top level of the fuel, said baille wall having passageways therethrough to permit the passage of gases passageways above stated closing the space between the combustion chamber and said re box from the normal top level of the fuel upwardly.

6. A furnace structure having a fire box, combustion chamber and ash pit, a grate structure beneath both said fire box and combustion chamber and separating said box and chamber from said ash pit, a baille wall structure interposed between said combustion chamber and fire 'box and extending downwardly to the normal top level of the fuel, said baiiie wall having passageways therethrough to permit the passage of gases from the lire box to the combustion chamber, means for supplying fresh air to said lire box above the grate, and means for supplying fresh air for mixing with the gases immediately to the rear of said baille wall, said baie wall except for the passageways above stated closing the space between the combustion chamber and said re box Ifrom the normal top level of the fuel upwardly.

7. A furnace structure having a fire box, combustion chamber and ash pit, and a baille wall interposed between said combustion chamber and fire box and extending downwardly into normal contact with the fuel,

said baille wall having channels leading from i the fire box to the combustionv chamber, and said baie wall except for the channels above mentioned closing the space between the fire box and combustion chamber from the fuel upwardly to the roof of the furnace.

8. A furnace structure having a re box, combustion chamber and ash pit, and a bale wall interposed between said combustion chamber and fire box and extending downwardly into normal contact with the fuel, said baille wall having channels leading from the fire box to the combustion chamber, said channels'extending in a downward direction from said re box to said combustion chamber, and said baffle wall except for the channels above mentioned closing the space between the fire box and combustion chamber from the fuel upwardly tothe roof of the furnace.

9. A furnace structure having a fire box, combustion chamber and ash pit, a bae wall inte osed between said combustion chamber and re box and' extending downwardly into normal contact with the fuel, said balile wall having channels leading from the fire box to the combustion chamber, and said baille wall except for the channels above mentioned closing the space between the lire box and combustion chamber from the fuel upwardly to the roof of the furnace, and means for supplying fresh air tothe lire box.

v said ba m sims-me having a l'a bmi; chamber and ash pit, a Enaia inex'psai Toeween saai combustion chamba and 'e bei; and @den i g downwady i, e normal Contact with 15h@ ua, said bae Wad having channels eadng from the 26 box the combustion chamhf, said chamls mi tending a downwa direction from sd re box to sai combustion chambezf.;l and m Wa excam ifm* the chames @bava u dosing 'me spa@ be'waen Eaux @mi cnmbusom chamber from the fuel upwa my to ljosi of theumace, and; maansor s'uppymg fresh au' to ghe re bmi@ Signed at Chicago hs 3d day of March @AW mim. 

